🔥(frontend) remove multi column drop cursor

The drop cursor for multi column was causing
issues with the editor's usability.
This commit removes the custom drop cursor
implementation to enhance user experience.

Author: AntoLC

src/frontend/apps/impress/src/features/docs/doc-editor/components/BlockNoteEditor.tsx

@@ -44,7 +44,6 @@ import {
 } from './custom-inline-content';
 import XLMultiColumn from './xl-multi-column';
 
-const multiColumnDropCursor = XLMultiColumn?.multiColumnDropCursor;
 const multiColumnLocales = XLMultiColumn?.locales;
 const withMultiColumn = XLMultiColumn?.withMultiColumn;
 
@@ -157,7 +156,6 @@ export const BlockNoteEditor = ({ doc, provider }: BlockNoteEditorProps) => {
       },
       uploadFile,
       schema: blockNoteSchema,
-      dropCursor: multiColumnDropCursor,
     },
     [collabName, lang, provider, uploadFile],
   );